Swansea Coroner's Office has told ITV News that further tests will now be carried out on Gareth Colfer-Williams, which are expected to take six to eight weeks.
His family have raised questions about the medical care he received in the days before his death.
More top news
Wales's vote to leave the European Union should not damage Cardiff's reputation as a 'inclusive' city, say council officials.
The two men who ran Wales Stronger in Europe have revealed where they think the campaign went wrong -and call for Jeremy Corbyn to resign.
After a dry start for many, rain will quickly spread across the country turning heavy in places, most likely in the north and west.